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3-9
CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
EAS00049
ENGINE
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
TIP
8 Valve clearance adjustment should be made
on a cold engine, at room temperature.
8 When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
1. Remove:
8battery box cover
8front cover
Refer to “COVER AND PANEL”.
2. Remove:
8spark plug cap
8spark plug
8ignition coil
8valve cover (intake and exhaust)
8breather
3. Measure:
8valve clearance
Out of specification J Adjust.
Valve clearance (cold)
Intake valve
0.10 ~ 0.14mm (0.004 ~ 0.006in)
Exhaust valve
0.16 ~ 0.20mm (0.006 ~ 0.008in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft counterclockwise.
b. When the piston is at TDC on the compres-
sion stroke, align the punch mark a in the
camshaft sprocket with the stationary b on
the cylinder head.
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